Design method of anti-angle collimator in magnetic confinement charged particle imaging system

The invention provides a design method of a reverse angle collimator in a magnetic confinement charged particle imaging system. The method comprises the steps that particle parameters are given, and the magnetic steel degree is calculated; system parameters are given, and the intensity of the magnetic lens and matching parameters in the x-axis direction and the y-axis direction are calculated; giving a field radius, a truncation angle value, a micro step number of a collimation space drift distance # imgabs0 # and a required precision value # imgabs1 #; calculating the initial coordinates of the particles in the x-axis direction and the y-axis direction and the micro step length of # imgabs2; setting an initial value of # imgabs3 # and an iteration step length of the # imgabs3 #; calculating the coordinates of the particles in the x-axis direction and the y-axis direction when the particles are transmitted from the initial coordinates to the initial value position of # imgabs4 #; whether # imgabs5 # and # img